Honda Odyssey towing set-up

So I just bought a TrailManor 2720, in fact this is my first post. I am really excited to use this with the fam. as we get closer to summer and all.

My question is in regards to my tow set up. Here is what I am planning on doing and wanted to get your opinions on setting up my mini van for towing:

1. Prodigy brake controller
2. T-1000 air bags
3. Tranny cooler
4. Hidden Hitch
5. Mckesh mirrors
6. I will want to put some bikes on the back if possible

I will have this all installed by my friend who is a Toyota mechanic. I am looking at about 500- for all of it not including some install money for my friend.

Is there anything else I am missing on this.

Thanks.